Timer



E; S. HUSH.

TIMER.

AFPLl-CATION man 0cT.r2.1920.

Eni ma M11317, 1921.

\NYENTOR ESTOL SENN RUSH H15 ATTOF N EYS UNITED STATES PATENT. OFFICE.

EBTOL SENN RUSH, OF LOS ANGELES, CALIFORNIA.

TIMER.

Specification of Relssued Letters Patent. I Reissued M 17 1921, 9 I

Original 110. 1,382,637, dated March 2, 1920, Serial No. 294,921, flled May 5, 1919. Application for re issue filed October 12, 1920. Serial No. 416,553.

scribed and claimed.

Further objects and advantages will be made evident hereinafter.

Referring to the drawings which are for illustrative purposes only,

Figure 1 is a section on a plane indicated by the line 11 in Fig. 2.

Fig. 2 is a section on a plane indicated by the line 2-2 of Fig. 1..

Fig. 3 is a side elevation of the traveling member carried by the cam shaft.

Fig. 4 is a sectional detail through the contact roller mounted on the traveling member, the view being taken on a plane indicated by the line 4-4 of Fig. 1.

Fig. 5 is an enlarged fragmentary sectional detail showing the drain for oil and dirt, the View being taken on the line of Fig. 1 and looking in the direction indicated by the arrow.

The traveling member 1 is rigidly mounted upon the cam shaft 2. The details of the traveling member 1 are as follows:

The bearing 3 fits tightly upon the cam shaft '2 and has a slot 4 extending from its outer end and a screw 5 is inserted through the slot 4 into the cam shaft 2 to hold the hearing 3 in place. A lug (3 extends from one side of the bearing 3 and has a. bore 7 parallel with the cam shaft 2.

A pivot )in 8 is rotatably mounted in the hore'T. Tlie lug G is shorter than the bearing Sand a pivoted plate J fits against the outer end of the lug (3 and the pivot pin 8 crtcnds through the pivoted plate 9 and is rigidly fixed in the plate. 1

A stop 10 is bent upwardly from one end of the pivoted plate 9 to engage the side of the lug G to limit the movement of the plate. 9 in one direction.

A spring seat 11 is fo med upon the hearing 3 at the opposite side of the lug 6, from the stop 10.

An expansive coil spring 12 fits against the spring seat 11.

A second support the outer end of the spring 12, the tension of the spring 12 being exerted to throw the pivoted plate 9 outwardly from the cam shaft 2.

A spindle 14 fits against the pivoted plate 9 and has a reduced portion 15 extending through the plate 9 and riveted to form a head 16. A key slot 17 is formed in one side of the spindle 14. A contact roller 18 is .rotatably mounted upon the spindle 14 and htsendwise against the pivoted plate 9.

A bore 19 through the roller 18 fits closely upon the spindle 14 and the end face 20 from which the bore 19 is formed fits against the inner face 21 of the pivoted plate 9. Y

An enlarged bore 22 extends from the bore 19 to the outer end face 23 of the roller. A spr1ng seat 25 fits loosely upon the spindle 14 and loosely in the enlarged bore 22 and has a. tongue forming a key 26 fitting loosely in the key slot 1? sons to hold the spring seat 25 from rotating on the spindle 14 and at the same time allow the roller 18 to rotate freely upon the spindle.

An expansive coil spring 27 fits around the spindle 1:1 in the enlarged bore 22, the

inner end of the spring 27 being attached to the inner spring seat 25 and the outer end of the spring 27 being attached to the outer sprilig seat 28. The outer spring seat 28 is in the form of a washer fitting against the outer end of the spindle 14. there being a neck 29 extending from the eiid of the spindle 14 through the washer and riveted to form a head 30 to hold the washer in place. The spring seat 28 is large enough to support the outer end of the spring 27 and small enough to pass freely into the bore 22 so that the roller 18 mayiinove endinn. upon the spindle. The tension of the spring is exerted to move thev roller 18 toward the pivoted plate The contact roller 18 has a straight central annular peri 'ihcry 31., a bevel annular periphery 32 extending inwardly from the outer end oithe periphery 31 and a bevel annular periphery 33 extending outwardly from the inner end of the periphery 31.

The traveling member 1 operates in a Stiltlfil'lflly,Jl'ltlllbtl 34. The details of the stationary member 34 are as follows:

The casing is pressed from heavy sheet metal and comprises a straight annular hand port'unuS-B and a dished web 36 having a. central denti {ln operating arm 38 extends outwardly from the web 3.6 and an oil hole 39 isformed through the web.

An insulating bearing ring 40 is preferably formed of hard fiber. The ring 40 fits tightly within the band portion and is s aced from the outer edge of the web 36 to orm the' annular drain trough41.

A bevel flange 42 extends inwardly from the ring at the outer side, that is next to the drain trough 41. Dovetail recesses 43, 44, 45 and 46 are formed across the ring 40 from its inner face and extend part way into the flange 42.

Dovetail contact plates 46', 47, 48 and 49 are inserted endwise into the recesses 43, 44, 45 and 46 and the binding posts 50, 51, 52 and 53 are inserted through the band 35, through the ring 40 and tapped into the contact plates 46, 47, 48 and 49 and'nuts 54 are applied to the outer ends of the bind ing posts to hold the posts in place and to hold the contact plates in place.

Insulation washers 55 are placed under the nuts 54 to fit against the band and the holes 56 in the band 35 are large enough to insulate the band from theposts. The contact plates 46, 47, 48 and 49 have beveled faces 57 matching with the beveled v flange 42 and adapted to be engaged by'the bevel annular periphery 32 of the roller '18 and the contact plates have straight faces 58 adapted to be engaged by the straight periphery 31 ofthe contact roller 18 and .beveled edges 59 adapted to be engaged by the beveled annular periphery33 of the contact roller, so that when the cam shaft 2 is operating and the traveling member 1 moves within the stationary member 34 there is a straight line contact between the contact roller 18 and the contact plates 46', 47, 48 and 49, said straight line being in a plane radial to the axis of the roller 18 and between the beveled periphery 33 and the beveled edge 59 and between the straight periphery 31 and the straight face 58 and I between the beveled periphery 32 and the beveled face 63. i y

The face 60 of the ring 40 is beveled to match the bevel 59 and inclined slots 61 are formed from the face 62 and the face 63 between the contact plates to discharge the grease, oil and dirt outwardly to the annular trough 41. The parts are made up and all finished to ther to form the bevel face 60, the straig t face 62 and the bevel "face 63 upon the flange'42 in the ring 40.

The same operation forms the bevels 57 and 59 and the straight face 58 of each contact plate so. that the contact roller 18 has aperfectly smooth track. The contact between the roller 18 and the contact plates is actually a line thereby making it possible to accurately time the make and break.

21v invention involves broadly the conception of a dual contact roller,

roller which makes contact on its periphe y by what may be termed radial pressure and which in addition makes contact on a secondary contact face by what may be termed axial pressure, that is pressure along the axis of rotation of theroller. I find that the best results are obtained when the roller is made cylindrical and the secondary contact face is made conical as shown in drawings. In the drawings two secondary contact faces are shown on the roller at 32 and 33; Since the diameter of the periphery of the roller and the mean diameter of the secondary contact face are diiferent, it fol- I- lows that either the secondary contact must slip on the track, 2'. e. the ring 40 and the contact plates 46, 47, 48 and 49. In practice the tension of the springs-12 and 27 is so proportioned that both the secondary contacts and the periphery of the roller slip on the track a little thus producing a rubbing action which keeps the roller and track bright and tends to wear away irre larities caused by burning or arcing.

dual contact a greater wearing arcing surface is provided.

The dual contact also provides two or more alternate or multiple current paths. If for example the periphery of the roller which makes a line contact with the track encounters a bit of dirt or is thrown out of contact with the track for any reason, this interrupts the circuit at the periphery of the roller and would cause an arc, wit

consequent burning or pitting, were it not for the secondary contacts due to the pitting.

My invention further involves anovel construction of roller in which the arcing at the bore of the roller is eliminated.

In the standard form .of'Ford timer in which a purely cylindrical roller is used, there is a very rapid enlargement of the bore and reduction of the pin on-which it turns due to the fact that current must be conducted through the oil film surrounding the pin. In my timer, no current need flow through this oil film, the current flowin from the. roller 18 to the washer 25 an through the spring 27 or the key 26 to the pin. As the pin or spindle 14 the washer 25 and the spring 27 are stationary with rela- .tion to each otl'ter-or. at most have a very ,slight and-intermittent mutual movement the dchances of arcing are very remote. that is a The sliding ,contact between the washer 25 130 ythe and the roller 18 is maintained at all times by the spring 27 and this contact is constantly subject to a rubbing or wearing action tending to keep it bright and clean. As

a consequence, the roller 18 does not have its bore nor the spindle 14 have its periphery burned away by arcing.

The spring 27 and the washer 25 also act as a brake on the roller 18 somewhat accentuating the slip of the periphery of the roller 18 on the track and further promoting and insuring the rubbing or wiping action necessary to a clean track and roller.

It should be noted further that the periphcry 31 of the roller makes a line contact with the track as do the coned or beveled surfaces 32 and 33. Further the three separate lines of contact 71. e. on the periphery 31 and the conical beveled peripheries 32 and 33 are all in the same plane which also contains the axis of the roller 18 the shaft 2 and the track. Perfect timing is thus insured as all three lines of contact break the circuit at practically the same time.

I c aim:

1. In a timer a travel-ing member comprising a bearing adapted to fit upon a cam shaft, a lug extending from one side of the bearing and having a bore parallel with the cam shaft, a pivot pin rotatably mounted in the bore, a plvotedplate fitting against the outer end of the lug and fixed upon the pivot pin, a stop bent upwardl from one end of the plateto engage the side of the lug, a spring seat formed upon the hearing at the opposite side of the lug from the stop, an expansive coil spring fitting against the spring seat, a

second spring seat bent upwardly from the central portion of the pivoted plate to support the outer end of the spring, the tension of the spring being exerted to throw the pivoted plate outwardly from the cam shaft, :1 spindle fixed in the free end of the pivoted plate parallel with the cam shaft, and a contact roller mounted upon the spindle.

2. In a timer a traveling member comprising a baa riu adapted to lit upon a cam shaft, a lug e. tending from one side of the bearing, a pivoted plate connect-ail to the lug, a spindle fixed in the free end of the plate, and a contact roller mounted upon the spindle, said contact roller comprising a body having a bore in which the spindle fits and an. end face fitting against the pivoted plate and having an enlarged bore extending from the v first bore to the other endface of the body,

a spring seat fitting loosely upon the spindle and loosely in the enlarged bore and slidingly splined to the spindle, an expansive coil spring fitting around the spindle in the enlarged bore against the spring seat, and an outer spring scat fixed upon the outer end of the spindle against the spring, and said body having a straightcentral periphery, a beveled periphery extending inwardly from the outer end of the straight periphery, and a beveled periphery extending outwardly from the inner end of the straight periphery.

In a timer a stationary member comprising a'casing forming a straight annular hand portion and a dished web extending from one edge of the band, an insulating ring fitting tightly in the band and spaced from the web to form a trough and having a beveled flange extending inwardly at the edge adjacent the web, there being drain openings through the insulation leading to the trough and there being dove tail recesses formed across the ring from its inner face and extending into the beveled flange, dovetail contact plates inserted endwise into the recesses and binding posts inserted. through the hand, through the insulating ring, and tapped into the contact plates.

4. In a timer a stationary member comprising a casing forming a straight annular band portion and a dished web extending from one edge of the band, an insulating bearing ring fitting tightlyin the band and spaced from the web to form a trough and having a beveled flange extending inwardly at the edge adjacent the web, there being drain openings through the insulation leading to the trough and there being dove tail recesses formed across the rin from its inner face and extending into the eveled flange, dovetail contact plates inserted endwise into the recesses and binding posts inserted through the hand, through the insulating ring, and tapped into the contact plates, said insulating ring and contact plates being finished to form a straight annular inner face, a. beveled annular inner face extending inwardly from one side of the straight face and a beveled annular face extending outwardly from the other side of the straight face.

5. In a timer a traveling member having a contact roller spling pressed in one direction longitudinal of its axis, and a stationary member having contact plates against which the roller fits, said contact plates having central straight annular inner faces, beveled faces extendinginwardly at one side of the straight and. beveled faces extending outwardly at the other side of the straight faces, and said roller having a straight central periphery to fit the straight portions of the contact plates and a beveled periphery at one end to fit ihe inwardly extending i tion of members rotating inside and about i contact with a similarly beveled face on said track. 1

7. In a timer having an annular track composed of alternating sections of insulating and conducting material; the combinathe axis of'said track; a roller carried on said members, said roller having a secondary contact face; a Spring forcing said roller radially against said track; and a spring forcing said secondary contact axially against said track.

8. In a timer having an annular track composed of alternating sections of 1nsulating and conducting material; the combination of a member rotating inside of and about the axis of said track; a pivot pin carried by said member; a swinging arm pivoted on said pivot H in; a spindle carried on the free end of said swinging arm and hav ing its axis substantially parallel to the axisof said track; a roller mounted to turn and slide on said spindle and having a conicalsecondary contact face; means for forcing said spindle radially; and means a simi for forcing said rolleraxially on said spindle.

9; In a timer having an annular track composed of alternating sections ofinsulat- ,ing and conducting material; the combination of a member rotating inside of and about the axis of saidtrack; a pivot pin carried bysaid member ;a swinging arm pivoted on said pivot pin; a spindle carried on the free end of said swinging arm and having itsaxis substantially parallel to the axis of said track; a roller mounted to turn and slide on said spindle and having a conical secondary contact face; a spring forcing said spindle toward said track; and a spring forcin" said secondary contact face against fitrly beveled surface on said track.

10. In a timer having a track formed of alternate sections of conducting and insulating material in the form of an annular the axis of'said ring; a spindle carried on I said shaft; a roller turning on said spinpressing said washer axially of said spindle against said roller.

13. In a timer a spindle; a roller turning on said spindle; a washer on said spindle;

means for preventing the rotation of said 1 washer and at the same time allowing it to slide axially on said spindle; a compression spring surrounding said spindle, at one side of said roller, one end of said spring press mg against said washer; and means on said spindle forming a bearing for the other end of said spring. a

14. In a timer, a pivoted plate; a spindle secured to said plate; a roller on said spindle adjacent to said plate; a washer on said spindle adjacent to said roller on the end away from said pivoted plate; means for preventing said washer from turning on said spindle; a compression spring on said, spindle pressing said washer against, said roller; and means on the end of said spindle for taking the thrust of said spring.

15. Ina timer having a track formed of alternate sections of conducting and insulating material in the form of a ring; a

roller inside said ring; members fixed to a.

shaft at the axis ofsaid ring; a spindle carried by said members on which said roller turns; means for forcing said roller against said ring; and friction means for resisting the turning of said roller on said spindle.

16. In, a timer having a track formed of alternate sections of conducting and insulating material in the form of a ring; a roller inside said ring; members fixed to a shaft of the axis of said ring; a spindle cari ried by said members on' which said roller turns; means for forcing said roller agalnst said ring; and a friction device pressing against said roller for retarding its rotation on said spindle.

17. In a timer having a track formed of alternate sections of conducting and insulating material in the form of a ring; a

roller inside said ring; members fixed to a shaft of the axis of said ring; a spindle carried by said members onwhich said roller turns; means for forcing said roller against said ring; a friction member in contact with said roller; and elastic means for pressing said friction member against said roller.

In testimony whereof I have hereunto subscribed my name at Los Angeles, California, this 5th day of October, 1920.

ESTOL SENN RUSH. 

